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. 1998 Aug 7;265(1404):1441–1445. doi: 10.1098/rspb.1998.0455

Successful horizontal transfer of Wolbachia symbionts between Trichogramma wasps

S Grenier, B Pintureau, A Heddi, F Lassabli re, C Jager, C Louis, C Khatchadourian
PMCID: PMC1689218

Abstract

Rickettsial symbionts of the genus Wolbachia, harboured by many arthropod species, are implicated in feminization, cytoplasmic incompatibility and parthenogenesis phenomena. These symbionts induce thelytokous parthenogenesis in some egg parasitoids of the Trichogramma genus. In our study of these minute wasps, purified Wolbachia from an infected species, T. pretiosum, were transferred by microinjection into in vitro developed pupae of an uninfected species, T. dendrolimi. We believe this to be the first successful transfer of Wolbachia in parasitoids. The presence or absence of Wolbachia was determined using DAPI staining, PCR and ftsZ gene sequencing. An ftsZ gene fragment from microinjected T. dendrolimi was shown to be identical to that of T. pretiosum, confirming that transfer was successful. Wolbachia were still present in the recipient species 26 generations after the transfer, although only partial induction of thelytoky was observed. Therefore, in Trichogramma, density of symbionts or symbiont–host interactions may be involved in the expression of parthenogenesis. The successful transfer of the symbiont within the Trichogrammatidae, a group of insects used in biological control strategies, could increase their agronomic importance by manipulating their reproductive system.

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Selected References

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